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A037797 as a simple table

na(n)
13
226
3209
41672
513379
6107034
7856273
86850184
954801475
10438411802
113507294417
1228058355336
13224466842691
141795734741530
1514365877932241
16114927023457928
17919416187663427
187355329501307418

[3,26,209,1672,13379,107034,856273,6850184,
 54801475,438411802,3507294417,28058355336,
 224466842691,1795734741530,14365877932241,
 114927023457928,919416187663427,7355329501307418]